1325689 has 4 divisors (see below), whose sum is σ = 1350756. Its totient is φ = 1300624.

The previous prime is 1325669. The next prime is 1325693. The reversal of 1325689 is 9865231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9865231 = 311 ⋅31721.

It can be written as a sum of positive squares in 2 ways, for example, as 1192464 + 133225 = 1092^2 + 365^2 .

It is a cyclic number.

It is not a de Polignac number, because 1325689 - 2⁵ = 1325657 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1325659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12454 + ... + 12559.

It is an arithmetic number, because the mean of its divisors is an integer number (337689).

2^1325689 is an apocalyptic number.

It is an amenable number.

1325689 is a deficient number, since it is larger than the sum of its proper divisors (25067).

1325689 is an equidigital number, since it uses as much as digits as its factorization.

1325689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25066.

The product of its digits is 12960, while the sum is 34.

The square root of 1325689 is about 1151.3856869008. The cubic root of 1325689 is about 109.8534964258.

Adding to 1325689 its product of digits (12960), we get a square (1338649 = 1157²).

The spelling of 1325689 in words is "one million, three hundred twenty-five thousand, six hundred eighty-nine".